216479 has 4 divisors (see below), whose sum is σ = 219600. Its totient is φ = 213360.

The previous prime is 216451. The next prime is 216481. The reversal of 216479 is 974612.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 216479 - 2¹² = 212383 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216179) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1454 + ... + 1595.

It is an arithmetic number, because the mean of its divisors is an integer number (54900).

2²¹⁶⁴⁷⁹ is an apocalyptic number.

216479 is a deficient number, since it is larger than the sum of its proper divisors (3121).

216479 is an equidigital number, since it uses as much as digits as its factorization.

216479 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3120.

The product of its digits is 3024, while the sum is 29.

The square root of 216479 is about 465.2730381185. The cubic root of 216479 is about 60.0443191074.

The spelling of 216479 in words is "two hundred sixteen thousand, four hundred seventy-nine".